Given a triangle with the base of 3cm and the height of 4cm. Find the area of this triangle.
The picture below shows the triangle with the base of 3cm and the height of 4cm.
To calculate the area, we use the formula for the area of a triangle:
Since the base is given as 3cm, we can substitute b with 3. Similarly, since the height is given as 4cm, we can substitute h with 3. After doing so, we can calculate for A, as shown below:
Now, the calculated number 6 has no meaning unless we include the unit for it. Since the base is in cm, the unit for the area will be cm2. Hence:
Clearly, the answer is D.
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